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Three Faradays electricity was passed through an fused solution of iron (II) bromide. The weight of iron metal ( at.wt = 56) deposited at the cathode( in gm) is

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answer is B.

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Detailed Solution

$F e^{+ 2} + 2 \bar{e} \to F e$

2F 1mole (56g)

3F $\frac{56}{2} \times 3 = 84 g$

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